Patent US4701362A successfully refreshed from Google Patents.
US4701362A
Expired / Lapsed
US
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Dielectric material in sheet form
Assignee: Junkosha Co Ltd
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Filing: 1986-10-21
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Granted: 1987-10-20
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Expires: 2006-10-21
Abstract
Abstract A dielectric sheet material useful in electronics applications is provided. The material preferably is porous, expanded polytetrafluoroethylene (PTFE) having a plurality of through-holes. The walls of the through-holes are solid, sintered PTFE which impart a high degree of compressive strength to the otherwise highly compressible porous PTFE. The through-holes having solid walls may be formed in the material by a laser or by other means.
Inventors
- 👤 Hirosuke Suzuki
- 👤 Haruo Imaizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:01
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; B; B29; B29C; B29C67/00; B29C67/20; B29C67/205; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; H01B3/445; B29C2793/00; B29C2793/0045; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2105/00; B29K2105/04; B29K2105/045; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
A dielectric sheet material of an open cell, continuously porous polymeric material having a plurality of through-holes therethrough, said through-holes having walls, the polymeric material adjacent said walls being substantially solid polymer in the form of highly compression resistant solid pillars.
Claim 2
Dependent Claim
41 words
A dielectric sheet material of an open cell, continuously porous polymeric material having a plurality of through-holes therethrough, said through-holes having walls, the polymeric material adjacent said walls being substantially solid polymer in the form of highly compression resistant solid pillars.
Claim 3
Dependent Claim
14 words
The dielectric sheet of claim 1 wherein said polymeric material is porous, expanded polytetrafluoroethylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |